Some time ago I wrote a article explaining how to guarantee the anteriority of a document (the timestamp), as well as the author, using the bitcoin block chain, by sending a small amount to a particular address.

An alternative is to use the Domain Name System, and to register a ...

I have been battling for a while to find the best way to outsource my data "in the cloud". I mean personal data: camera pics, documents, backups, etc. What I want to achieve is:

• no worry about hard disk failure, theft, fire and so on (you never know - our life ...

Looking at Bitcoin addresses and the way they are constructed, we can easily write a bash script that generates a valid address from any SHA-256 hash.

initialsha=600FFE422B4E00731A59557A5CCA46CC183944191006324A447BDB2D98D4B408  
ripemd160=`echo -n $initialsha | xxd -r -p | openssl rmd160 -binary | xxd -p`  
extripemd160=`echo 00$ripemd160`  
finalsha=`echo $extripemd160 | xxd -r -p ...